Adequacy of pseudo-direct georeferencing of terrestrial laser scanning data for coastal landscape surveying against indirect georeferencing

The georeferencing process is crucial to the accuracy of terrestrial laser scanner (TLS) data, in particular in the context of diachronic studies relying on multi-temporal surveys. The use of Ground Control Points in the georeferencing process can however be complex when confronted with the practica...

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Bibliographic Details
Published in:European journal of remote sensing 2017-01, Vol.50 (1), p.163-174
Main Authors: Jaud, Marion, Letortu, Pauline, Augereau, Emmanuel, Le Dantec, Nicolas, Beauverger, Mickaël, Cuq, Véronique, Prunier, Christophe, Le Bivic, Réjanne, Delacourt, Christophe
Format: Article
Language:English
Subjects:
Adequacy
coastal monitoring
Coastal zone management
Continental interfaces, environment
direct georeferencing
Earth Sciences
Environmental Engineering
Environmental Sciences
Geographic information systems
Geography
geomorphological evolution
Geomorphology
Global positioning systems
GPS
Humanities and Social Sciences
Inclinometers
indirect georeferencing
Laser applications
Lasers
multi-temporal surveys
Pitch (inclination)
Position measurement
Remote sensing
Rolling motion
Satellite navigation systems
Sciences of the Universe
Surveying
Terrestrial environments
Terrestrial laser scanning
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Summary:The georeferencing process is crucial to the accuracy of terrestrial laser scanner (TLS) data, in particular in the context of diachronic studies relying on multi-temporal surveys. The use of Ground Control Points in the georeferencing process can however be complex when confronted with the practical constraints of coastal surveying. A simple and quick alternative method called "pseudo-direct georeferencing" is proposed in the present paper. This method involves internal inclinometers to measure roll and pitch angles and a centimetric GPS to measure the position of the TLS center and the position of one backsight target. When assessing the transformational uncertainty by using a set of independent ground validation points for both classical indirect and proposed pseudo-direct methods, we respectively obtain root mean square errors of 4.4 cm for the indirect method and 3.8 cm for the pseudo-direct method.
ISSN:2279-7254
2279-7254
DOI:10.1080/22797254.2017.1300047